pitchfoed



J'. B. PITCHPORD.

(NoModel.)

PILLOW BLOGK.

No. 283,657. Patented Aug.- 21, 188s.

UitnrrnnV Sterns JOHN B. PITCHFORI), OF SAN FRANCISCG, CALIFORNIA.

PI LLOW-BLOCK.

SMPEGIFICATION forming part of Letters Patent No. 283,657, dated August21, 1883. Application led Mayl, 1853. (No model.)

To @ZZ whom it may concern,.-

Beit known that I, JOHN B. Prrcnronn, of

San Francisco, county of San Francisco, and

State of California, have invented an Improve- -shafts, die. and itconsists of a means for adjusting the quarter-brasses of a pillow-blockwith reference to the shaft by means of vertically-moving wedges andthrust-screws, which are so arranged that the caprof the pillowblocl;can be taken off without allowing the shaft to lose its proper position.

In the ordinary constructionof pillo w-bloclrs the wedges have beenadjusted by screws passing through the piliow-block cap, andsuspendingthem so that the cap could not be removed without moving themand disturbing the adjustment, so that if the shaft were subjected tothe strain cfa heavy belt or the thrust of gear it was liable tobethrown out of line.l In my device the cap can be entirely removedwithout in any manner disturbing the shaft or its adjusting mechanism.

Referring to the accompanying drawings for a more complete explanationci' my invention, Figure lis a longitudinal vertical section of thepillow-block, taken through the brasses at right angles with the shaft.Fig. 2 is a perspective of the quarter-brass and wedge withthrust-screw. Fig. 3 is a plan view of pillow-- block, partly inhorizontal section.

A is the body of a pillow-block, and Bis the cap, which is retained inplace by bolt a and nut b.

C C are the quarter-brasses, which are forced against the shaft fromopposite sides by the wedges D. These wedges are as long as the width ofthe box, and have slots or openings formed in them to receive nuts F,through which screws E turn. These screws are long enoughv to extendfrom the base of the pillowblock up through the wedges and through thecap. The openings inthe cap and in the brasses are large enough to allowthe screws E to pass freely, and their upper ends are made square toreceive a wrench, by which they are turned. As the lower ends of thesescrews rest upon the base ofthe pillow-block, and then pass through thenuts F, which lie within the f the pressure, the screws E are turned intheV opposite direction, and they may also be forced down by means ofthe following screws G, which serve to hold them to their places.

Y/Vhen the cap B is to be removed, the nuts b are removed, and the capislifted off without touching the screws E, on account of the spacearound them.

If it is necessary to remove the quarterbrasses C, the wedges may belowered into the recesses II in the pillow-block until there issufficient space above to allow the brasses to be turned out of theirplaces. By this construction it will be obvious, that when the wedges l)are set up, so as to bring the quarter-brasses C C in contact with theshaft, the cap can be taken off without any possibility of the shaftgetting out of line.

By having a recess in the pillow-block to admit the large end of thewedge, and a recess in the cap for its small end, it is possible tocoverthe whole surface of the back of the quarter-brass with the wedge.

By supporting the screws'E upon the base of the pillow-block and liftingthe wedges from these points of support the strain upon the screws isone one of compression, instead of 9o IOO 2 i @easier ing their lowerends resting upon the pillowof the pillowblock, in combination withsetvblock, while their upper ends pass through screws passing throughthe cap and passing openings in the caps without contact or supupon theupper surfaces of the wedges, subport therefrom7 substantially as hereindestantially as herein described.

5 scribed. In witness whereof I have hereunto set my 15 2.Inapillow-block forshafting, and in comhand. n hina-tion with thequarter-brasses, wedges JOHN B. PTCHFORD. moved vertically by means ofVertical screws Wvtnesses:

passing through nuts within them, and hav- S. H. NOURsE,

1o ing their lower ends supported upon the bed G. B. STUDLEY.

